Save the human slaves from the Uruks in the Dark Lord’s land, human slaves are mercilessly worked by their cruel orc masters, and they’re absolutely everywhere. You need to save 30 slaves less than 3 min while riding a Caragor, to unlock or earn this Achievement/Trophy. A great location for this is on the left side of the second map ("Sea of Núrnen", where the second half of the story takes place).